fs: add a FMODE_BUF_WASYNC flags for f_mode

[sfrench/cifs-2.6.git] / fs / read_write.c

diff --git a/fs/read_write.c b/fs/read_write.c
index e0777eefd84650debb0bed304401f81d8ccb1c8e..319d88825d1cbdff739872456d64dd791243582d 100644 (file)
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1660,7 +1660,9 @@ int generic_write_checks_count(struct kiocb *iocb, loff_t *count)
        if (iocb->ki_flags & IOCB_APPEND)
                iocb->ki_pos = i_size_read(inode);
 
-       if ((iocb->ki_flags & IOCB_NOWAIT) && !(iocb->ki_flags & IOCB_DIRECT))
+       if ((iocb->ki_flags & IOCB_NOWAIT) &&
+           !((iocb->ki_flags & IOCB_DIRECT) ||
+             (file->f_mode & FMODE_BUF_WASYNC)))
                return -EINVAL;
 
        return generic_write_check_limits(iocb->ki_filp, iocb->ki_pos, count);